A.1 Power Interruption Recovery Scenarios

If power to your system is interrupted during updating of the flash PROM:

1. Turn the power switch to the Standby position to prevent power surge to the system when power is restored.

2. After power is restored to the system location, return the power switch to the Power-On position.

After power is restored, one of the following two recovery scenarios should happen on your system. Follow the instructions described for the appropriate scenario.

A.1.1 Scenario 1--System Recovers After Power Restoration

If your system attempts to autoboot after power is restored, or if it returns to the flash PROM's ok prompt, you must complete the programming process by rebooting the flash PROM utility. See Updating the Flash PROM.

A.1.2 Scenario 2--System Does Not Recover After Power Restoration

If your system does not boot or return to the ok prompt after power is restored:

Note - The Ultra 5, Ultra 10, and Sun Blade 100 systems do not have jumpers for high-half booting. If your system is an Ultra 5, Ultra 10, or Sun Blade 100, you must contact your service provider.

1. If the update was being run via a serial port and the system also has a frame buffer and keyboard installed, or if the system has a keyboard and more than one frame buffer installed:

a. Connect a monitor to each frame buffer.

b. Confirm that output has been redirected to one of the frame buffers.

The NVRAM configuration variables might have been modified because of the firmware update just before power was lost. If this happened, then the system output was possibly redirected to a device other than the one originally used to display it. This could only have happened if a keyboard was connected to the system.

If there is no keyboard connected to the system and the NVRAM configuration variables are set to their default values, then system input and output are directed to serial port A.

2. If output cannot be found on any of the installed frame buffers, follow the procedure in the section Changing Jumper or Keyswitch Settings to set the boot control jumper to boot from the half of the PROM that is not currently selected:

If the jumper is set for "high-half booting," move it to "normal booting."

If the jumper is set for "normal booting," move it to "high-half booting."

3. Power on the system.

If the system recovers, complete the updating process by rebooting the flash PROM utility. See Updating the Flash PROM.